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It is very interesting to study the boundedness for the commutators related to some integral operator on the functions spaces.

Marcinkiwicz算子作为分析数学中一个重要的积分算子，对它的研究一直是分析数学学者们十分感兴趣的问题。

They are related to the bowfin and date back to the Eocene Epoch.

与弓鳍鱼近缘，在始新世就生活于欧洲和北美。

The reaction mechanism between nickel ion and butynediols in the electroless plating process was analyzed. The results show that the change of BOZ concentration is a quasi first-order reaction, the change of the nickel ion concentration is related to the BOZ density, and this change belongs to a higher order reaction. The reaction rate equation was determined as dC/dt=-8.585×10^(-4)+1.188×10^(-4)t-4.64×10^(-6)t^2+5.8×10^(-8)t^3-2.3×10^(-11)t^4. The activation energy of this process decreases as temperature increases, and it decreases with the BOZ concentration as 64-423 mg/L, it increases with the BOZ concentration as 123~240 mg/L. The S value is positively correlated to temperature, when the temperature is 80℃, the reaction rate and S value are the largest; while when the temperature is above 80℃ and BOZ concentration is over 160 mg/L, S value and the reaction rate decrease gradually.

结果表明，镀液中BOZ浓度的变化是准一级反应，镍离子的浓度变化与BOZ的浓度有关，属多级反应，其反应速率方程为dC/dt=-8.585×10^(-4)+1.188×10^(-4)t-4.64×10^(-6)t^2+5.8×10^(-8)t^3-2.3×10^(-11)t^4，反应体系的活化能E随温度的升高而减少，随BOZ浓度的变化而变化：当BOZ浓度在64~123mg/L时，E线性减少；在123~240mg/L时E线性增加。S随温度的升高而增加，当温度达到80℃时S值最大，反应速度最大；当温度超过80℃，BOZ浓度大于160mg/L时，蝎的值逐渐减少，反应速度降低。

The results showed that the level of fluorine pollution in fruits is related to the distance from fruit trees to the brickkiln and the variety of fruit trees.

结果表明，水果受氟污染的程度与果树距砖厂的距离及果树的种类有关。

Based on the understanding of physiological pathway for broodiness, three genes related to broodiness including PRL, PRL receptor, and pituitary-specific transcription factor (POU1F1)-encoding genes were selected as candidates to screen the genomic variation by means of PCR-SSCP protocol and analyze the association with chicken broodiness and other target traits.

禽类血浆PRL水平上升与就巢行为的起始和维持具有密切的相关性，本研究采用候选基因的策略，通过分析就巢行为发生的生理机制，选择与就巢性状密切关联的PRL、PRL受体和PRL转录调控因子——垂体特异转录因子(pituitary-specific transcription factor，POUlF1)基因，采用PCR-SSCP分析检测基因变异，并分析基因变异与就巢性和其它目标性状的相关性。

Using the aforementioned experimental methods,the author has performedcareful study on the thermoanalytical characteristic of nanocrystalline brookite-basedTiO2,and found that on the DTA curve there exists a small irreversible endothermicpeak,which is related to the dramatic structural phasetransformation from brookite to anatase then to rutile.

利用上述实验手段，作者首次对板钛矿基(brookite-based)纳米TiO2的热分析特性进行了较系统、深入的研究，发现在DTA曲线上存在一较小的不可逆、无失重吸热峰，对应于从板钛矿经锐钛矿到金红石的急剧转变。

Litchi is very easy to brown,rot,go moldyand effuse juice without fresh-keeping treatment.These related to its physiologicalcharacters.

荔枝在没有经过任何保鲜措施处理前，果皮很容易产生褐变、霉变、腐烂、汁液渗出等现象，这与荔枝本身的生理特点有关。

Therefore, have produced a large number of idioms related to navigation and fishing; For example, spend money like water likens and spends money wasting, wasteful; Go by the board shows " to fail, fails "; Burn one's boats likens " cuts off all means of retreat and gives up the route of retreat by oneself "; All at sea shows the meaning of " at a loss "; Like a fish out of water likens " it is uneasy to be in the strange environment " etc..

由此，产生了大量的与航海和捕鱼有关的习语；例如， spend money like water比喻花钱浪费，大手大脚； go by the board表示"落空，失败"； burn one's boats比喻"破釜沉舟，自断退路"；all at sea表示"不知所措"的意思；like a fish out of water比喻"处在陌生的环境中不自在"等等。

With respect to the volatile compounds, methanol and 1- butanol were related to the raw material.

考虑到挥发性化合物，甲醇和1 -丁醇与原材料有关。

Then you discover that butter and buttermilk are intrinsically related to one another. They belong to the same stuff.

黄油本质上与酪乳不同，酪乳与牛油本质上也不一样。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。